* {
  box-sizing: border-box;
}

:root {
  --background-color: hsl(208.7, 100%, 89%);
  --shadow-color: hsla(208.7, 100%, 10%, 0.2);

  background-color: var(--background-color);
}

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  min-width: 320px;
  justify-content: center;
  display: flex;
  align-items: flex-start;
  gap: 40px 0;
  padding: 200px 44px 0;
}

.transition-color-picker {
  --last-transition-color: inherit;
  --color-size: 80px;
  display: flex;
  position: relative;
}

.transition-color-picker__helper {
  width: calc(var(--color-size) * 0.5);
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  position: absolute;
  top: 0;
  left: calc(var(--color-size) * 0.25);
  z-index: 3;
  animation: 1s helper infinite;
}

.transition-color-picker__helper svg {
  height: 100%;
}

.transition-color-picker__back-color {
  pointer-events: none;
  display: block;
  position: absolute;
  left: 0;
  top: 0;
  width: var(--full-width);
  height: var(--color-size);
  background: var(--last-transition-color);
  z-index: 0;
  border-radius: 10px;
}

.transition-color-picker__shadow {
  position: absolute;
  left: 0;
  top: 0;
  width: var(--full-width);
  height: 100%;
  display: block;
  pointer-events: none;
  z-index: 0;
  box-shadow: 0 20px 25px -5px var(--shadow-color),
    0 8px 10px -6px var(--shadow-color);
  border-radius: 4px;
}

.transition-color-picker__container {
  display: flex;
  z-index: 1;
}

.transition-color-picker__color {
  min-width: var(--color-size);
  height: var(--color-size);
  background: var(--color);
  cursor: pointer;
}

.transition-color-picker__from-color {
  border-radius: 4px 0 0 4px;
  position: relative;
  touch-action: none;
  z-index: 1;
}

.transition-color-picker__to-color {
  border-radius: 0 4px 4px 0;
  position: relative;
  left: 0;
  z-index: 1;
  touch-action: none;
}

.transition-color-picker__color:hover .transition-color-picker__icon {
  opacity: 1;
}

.transition-color-picker__copy-icon svg {
  position: absolute;
  transition: 0.25s ease opacity;
}

.transition-color-picker__icon {
  opacity: 0;
  color: white;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: 0.25s ease opacity;
  background: rgba(0, 0, 0, 0.4);
}

.transition-color-picker__to-color .transition-color-picker__icon {
  border-radius: 0 4px 4px 0;
}

.transition-color-picker__from-color .transition-color-picker__icon {
  border-radius: 4px 0 0 4px;
}

.transition-color-picker__icon svg {
  height: 50%;
}

.transition-color-picker__to-color,
.transition-color-picker__to-color .transition-color-picker__input {
  cursor: grab;
}

.transition-color-picker__to-color--dragging,
.transition-color-picker__to-color--dragging .transition-color-picker__input {
  cursor: grabbing;
}

.transition-color-picker__input {
  position: absolute;
  opacity: 0;
  inset: 0;
  left: 0;
  top: 0;
}

.transition-color-picker__input--animatable {
  transition: 0.25s ease all;
}

@keyframes helper {
  to {
    transform: translateX(100px);
  }
}

@media (max-width: 550px) {
  .transition-color-picker:nth-child(3) {
    display: none;
  }
}

@media (max-width: 400px) {
  .transition-color-picker:nth-child(2) {
    display: none;
  }
  .transition-color-picker {
    --color-size: 44px;
  }
}